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"The U.S. Bureau of Mines performed experiments to determine if the primary gas toxicities evolved during the early (approximately 300 deg c) and later (> or = to 400 deg c) combustion stages of chlorinated polyester-reinforced mine ventilation ducts could be predicted by a smoke particle characteristic, for the development of a test parameter. The experiments were conducted in an approximately 20-l furnace, at 14-min durations at set furnace temperatures of 250 deg and 1,000 deg c, with an airflow through the furnace of 10 l/min. The variables studied, as a function of time, were the hydrogen chloride (hcl), carbon monoxide (co), carbon dioxide (co2) and oxygen (o2) concentrations, furnace temperatures, the sample mass weight loss, the average smoke particle diameter (dg) and average number and concentration (no), and the product of the average smoke particle diameter and concentration (dgno). Results show that the inverse of the smoke particle diameter- concentration product (l/dgno) correlates directly and significantly with the primary gas toxicities evolved during both early (hcl) and later (co) stages of combustion." - NIOSHTIC-2

"The U.S. Bureau of Mines performed experiments to determine the embedded hydrogen chloride (hcl) and smoke particle characteristics during combustion of polyvinyl chloride (pvc) and chlorinated mine materials for development of a test parameter. The...

"The U.S. Bureau of Mines conducted experiments for predicting materials' ease of combustion (smoldering onset, smoldering, flaming, and decomposition rates) by means of submicrometer smoke particle characteristics for the development of a simple tes...

"The U.S. Bureau of Mines performed experiments to determine the hydrogen cyanide (HCN) concentrations and smoke particle characteristics during the combustion of flexible polyurethane foams and other nitrogen-containing materials for the development...

"The U.S. Bureau of Mines conducted a study to determine if correlations exist between the chlorine or nitrogen contents of materials and the hydrogen chloride (HCI) or hydrogen cyanide (HCN) concentrations evolved during the thermal decomposition of...

"The U.S. Bureau of Mines performed experiments to determine if the primary gas toxicities evolved during the early (approx. 300 Deg c) and later (> or = to 400 deg c) combustion stages of mine conveyor belts could be predicted by a smoke particle ch...

or = to 400 deg c) combustion stages of mine conveyor belts could be predicted by a smoke particle ch...">